How to distinguish between good and bad desk lamp?
The right to use the eye lamp, many people think that eye lamp just open the eye on the line, is actually a misunderstanding, if a single eye lamp, around the dark, not good for the eyes, the reason is very simple, because the light is too large, the eyes of the burden is too heavy, but increased the burden on the eyes, fatigue, correct use, in the open eye at the same time, a general lighting, this eye is best, can play a role in the prevention of myopia, relieve eye fatigue, which is a lot of people often misinterpret the unknown place.
If you are interested in open the machine, see circuit slips, understand, circuit of poor quality is too poor, is simply a screwdriver in factory production. Good products, electronic ballasts choose high quality epoxy glass fiber fireproof PCB circuit board, and 100% for ultra high pressure aging process. General circuit version of the product repair is very high, good circuit version repair is very low.
A lot of good products, tubes generally use three primary color rare earth fluorescent tube, reflected the effect, the lights are very soft, expert in lamplight, hand will appear flesh color, feel very good. Poor quality, cheap, usually the use of halogen powder tube, the lights are very white, hand in the lamplight is very pale, like the appearance of the dead, lost color. Dear friends, the difference between the price of rare earth and halogen powder is too large, at least 5 times more. This is the reason why some products are sold very cheaply.
See the lights to see the general appearance, the poor quality of the products is only recycled plastic, at a glance, fragile, and toxic, general percussion sound crisp, like to knock the bad feeling, appearance is very good, some still painted, people feel very thin, very toxic Oh, he shows the finish is very good, a little better is made of ABS plastic, anti impact strength, and durable, generally mid-range products used, but finish slightly worse, the best is imported ABS plastic, not only the strength and impact resistance, good non-toxic, strict examination procedures.
